launch

how to open a 'csv file' like 'url launcher' in Flutter

て烟熏妆下的殇ゞ — Wed, 10 Feb 2021 10:29:38 +0000

how to open a 'csv file' like 'url launcher' in Flutter て烟熏妆下的殇ゞ 2021-02-10 18:29:38

问题

i converted list into File of .csv extension then tried OpenFile.open and ended up with error No permissions found in manifest for: 2, tried canLaunch and ended up with error name.csv exposed beyond app through Intent.getData(), Failed to handle method call

so how to open that csv file in any 3rd part application.

回答1:

You can copy paste run full code below
and make sure you have a file /sdcard/Download/sample.csv, see picture below
You also need CSV Viewer installed in your Emulator
code snippet

    final filePath = '/sdcard/Download/sample.csv';
    print('${filePath}');
    final message = await OpenFile.open(filePath);

working demo

device file explorer

full code

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:open_file/open_file.dart';

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _openResult = 'Unknown';

  Future<void> openFile() async {
    //final filePath = '/sdcard/Download/sample.pdf';
    final filePath = '/sdcard/Download/sample.csv';
    print('${filePath}');
    final message = await OpenFile.open(filePath);

    setState(() {
      _openResult = message;
    });
  }

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text('open result: $_openResult\n'),
              FlatButton(
                child: Text('Tap to open file'),
                onPressed: openFile,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

来源：https://stackoverflow.com/questions/59053056/how-to-open-a-csv-file-like-url-launcher-in-flutter

标签

csv

Flutter

launch

how to open a 'csv file' like 'url launcher' in Flutter

ぐ巨炮叔叔 — Wed, 10 Feb 2021 10:29:24 +0000

how to open a 'csv file' like 'url launcher' in Flutter ぐ巨炮叔叔 2021-02-10 18:29:24

问题

so how to open that csv file in any 3rd part application.

回答1:

You can copy paste run full code below
and make sure you have a file /sdcard/Download/sample.csv, see picture below
You also need CSV Viewer installed in your Emulator
code snippet

    final filePath = '/sdcard/Download/sample.csv';
    print('${filePath}');
    final message = await OpenFile.open(filePath);

working demo

device file explorer

full code

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:open_file/open_file.dart';

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _openResult = 'Unknown';

  Future<void> openFile() async {
    //final filePath = '/sdcard/Download/sample.pdf';
    final filePath = '/sdcard/Download/sample.csv';
    print('${filePath}');
    final message = await OpenFile.open(filePath);

    setState(() {
      _openResult = message;
    });
  }

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text('open result: $_openResult\n'),
              FlatButton(
                child: Text('Tap to open file'),
                onPressed: openFile,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

来源：https://stackoverflow.com/questions/59053056/how-to-open-a-csv-file-like-url-launcher-in-flutter

标签

csv

Flutter

launch

Determine when application icon is clicked to launch the app in android

筅森魡賤 — Sun, 07 Feb 2021 19:36:26 +0000

Determine when application icon is clicked to launch the app in android 筅森魡賤 2021-02-08 03:36:26

问题

Is there any way in android to determine when the user clicked the app icon to launch the app ? I mean say a user was using my app. Then he presses the home key as a result of which the app goes to the background. After sometime he clicks the app icon again. My question is do I get a call-back for this ?

回答1:

Just to inform, I used the flag android:clearTaskOnLaunch="true" in my launcher activity. As a result, its onResume method was called and I could identify that the launcher icon was clicked

回答2:

It will call the onResume() method if the app is already in the stack. And if the app not in the stack then it will call the onCreate() method.

This mechanism is based on the launchMode specified for the activity.

回答3:

please read http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle

How many activities your application has, you will get a callback onResume() for the last open activity.

来源：https://stackoverflow.com/questions/2786160/determine-when-application-icon-is-clicked-to-launch-the-app-in-android

标签

android

launch

How to leave the current app and launch an activity of another app?

泄露秘密 — Fri, 29 Jan 2021 01:03:08 +0000

How to leave the current app and launch an activity of another app? 泄露秘密 2021-01-29 09:03:08

问题

I have a simple Android app that needs to launch another app under certain condition, and I will need to check the condition upon the app launch. That is, either continue to launch my app or just launch another app:

if (A == true) {
 launch another activity of another app
 leave the current app without creating the main activity
} else {
 launch the main activity of the current app
}

Could anyone please let me know how to deal with A == true case? I am able to launch another app's activity but I have trouble leaving the current app without even opening the main activity.

Any help will be greatly appreciated!

回答1:

You can launch other application using following intent

Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage("com.example.abc");//pass the packagename of app you want to open
startActivity( LaunchIntent );

If you don't know the package name of application that you wanted to launch then try your hand on

PackageManager pm;
pm = getPackageManager();
//  get a list of installed apps.
packages = pm.getInstalledApplications(0);

Pass the packagename of app you want to open You can use this if A == true

else You can launch the MainActivity as

startActivity(new Intent(CurrentActivity.this,MainActivity.class));

回答2:

If you want to start another activity of another app without the normal IntentFilter then the easiest solutions is:

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setComponent(new ComponentName("com.anotherapp.package","com.anotherapp.package.MainActivity"));
startActivity(intent);

Of course, you would need to know the package name and the Activity name you want to start

As for finishing your application call

finishAndRemoveTask();

来源：https://stackoverflow.com/questions/50017762/how-to-leave-the-current-app-and-launch-an-activity-of-another-app

标签

android

android-activity

launch

WatchOS3 Complication that launches App

杀马特。学长韩版系。学妹 — Thu, 24 Dec 2020 06:27:53 +0000

WatchOS3 Complication that launches App 杀马特。学长韩版系。学妹 2020-12-24 14:27:53

问题

I would like to create a complication for watchOS 3 that will simply launch my App. I have used XCode to create the ComplicationController:

class ComplicationController: NSObject, CLKComplicationDataSource
{

    // MARK: - Timeline Configuration

    func getSupportedTimeTravelDirections(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimeTravelDirections) -> Void) {
        handler([.forward, .backward])
    }

    func getTimelineStartDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) {
        handler(nil)
    }

    func getTimelineEndDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) {
        handler(nil)
    }

    func getPrivacyBehavior(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationPrivacyBehavior) -> Void) {
        handler(.showOnLockScreen)
    }

    // MARK: - Timeline Population

    func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
        // Call the handler with the current timeline entry
        handler(nil)
    }

    func getTimelineEntries(for complication: CLKComplication, before date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) {
        // Call the handler with the timeline entries prior to the given date
        handler(nil)
    }

    func getTimelineEntries(for complication: CLKComplication, after date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) {
        // Call the handler with the timeline entries after to the given date
        handler(nil)
    }

    // MARK: - Placeholder Templates

    func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
        // This method will be called once per supported complication, and the results will be cached
        handler(nil)
    }

}

and added images for the Circular, Modular and Utilitarian assets. But when I run the Watch App I cannot select my complications for a Watch face. What do I still need to do?

Thanks

Greg

回答1:

These code changes are required:

func getSupportedTimeTravelDirections(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimeTravelDirections) -> Void)
{
    handler([])
}


func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void)
{
    if complication.family == .circularSmall
    {

        let template = CLKComplicationTemplateCircularSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Circular")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
        handler(timelineEntry)

    } else if complication.family == .utilitarianSmall
    {

        let template = CLKComplicationTemplateUtilitarianSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Utilitarian")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
        handler(timelineEntry)

    } else if complication.family == .modularSmall
    {

        let template = CLKComplicationTemplateModularSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Modular")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
        handler(timelineEntry)

    } else {

        handler(nil)

    }

}


func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void)
{        
    switch complication.family
    {
        case .circularSmall:
            let image: UIImage = UIImage(named: "Circular")!
            let template = CLKComplicationTemplateCircularSmallSimpleImage()
            template.imageProvider = CLKImageProvider(onePieceImage: image)
            handler(template)
        case .utilitarianSmall:
            let image: UIImage = UIImage(named: "Utilitarian")!
            let template = CLKComplicationTemplateUtilitarianSmallSquare()
            template.imageProvider = CLKImageProvider(onePieceImage: image)
            handler(template)
        case .modularSmall:
            let image: UIImage = UIImage(named: "Modular")!
            let template = CLKComplicationTemplateModularSmallSimpleImage()
            template.imageProvider = CLKImageProvider(onePieceImage: image)
            handler(template)
        default:
            handler(nil)
    }
}

Plus you need to provide the images as assets in the extension.

回答2:

Apple Watch 4 new graphic complications looks like this:

func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
    // Call the handler with the current timeline entry
    switch complication.family {
    case .graphicCorner:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCornerCircularImage()
            let image = UIImage(named: "Complication/Graphic Corner")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
            handler(timelineEntry)
        } else {
            handler(nil)
        }
    case .graphicCircular:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCircularImage()
            let image = UIImage(named: "Complication/Graphic Circular")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
            handler(timelineEntry)
        } else {
            handler(nil)
        }
    default:
        handler(nil)
    }
}

func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
    // This method will be called once per supported complication, and the results will be cached
    switch complication.family {
    case .graphicCorner:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCornerCircularImage()
            let image = UIImage(named: "Complication/Graphic Corner")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            handler(template)
        } else {
            handler(nil)
        }
    case .graphicCircular:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCircularImage()
            let image = UIImage(named: "Complication/Graphic Circular")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            handler(template)
        } else {
            handler(nil)
        }
    default:
        handler(nil)
    }
}

回答3:

Add Apple Watch 4 new graphic complications (watchOS 5.0+) and prevent crash on Apple Watch Series 1, 2 and 3.

Important: the code from Zoltan will crash on Apple Watch series 3 or lower.

According to the Apple documentation, the new graphic complications require watchOS 5.0 or higher and a Watch Series 4 or later:

Note Watch faces that support graphic templates are available only on Apple Watch Series 4 or later.

This means that a Watch Series 3 with watchOS 5 or 6 (due to if #available(watchOSApplicationExtension 5.0, *)) will attempt to load the complication image from the asset catalogue. However, since App Thinning is enabled by default, the Watch Series 3 doesn't have the image in it's binary and therefor the following line will crash the app:

let image = UIImage(named: "Complication/Graphic Corner")!

We discovered this when we found thousands of crash reports in Xcode:

Open Xcode
Window -> Organizer
Select tab "Crashes"
Select an App Store version

We found a crash report for each of the 2 Graphic complications that we support, all were with watchOS 5 or 6 and Watch Series 2 or 3, like:

Solution

Embed loading of the graphic asset within an IF statement and return nil as template, so it won't crash on devices without the asset.

The example above from Zoltan will be:

case .graphicCorner:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCornerCircularImage()
            if let image = UIImage(named: "Complication/Graphic Corner") {
                template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
                let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
                handler(timelineEntry)
            } else {
                handler(nil)
            }
        } else {
            handler(nil)
        }

For efficient and maintainable code, we created a reusable function templateForComplication() that is used in all 3 mandatory delegate functions:

class ComplicationController: NSObject, CLKComplicationDataSource {
    
    // MARK: Mandatory Delegate Methods
    
    func getSupportedTimeTravelDirections(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimeTravelDirections) -> Void) {
        // Turn off time travelling:
        handler([])
    }
    
    func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
        let template = templateForComplication(complication: complication)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template!)
        handler(timelineEntry)
    }
    
    func getPlaceholderTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
        // This method will be called once per supported complication, and the results will be cached
        handler(templateForComplication(complication: complication))
    }
    
    func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
        handler(templateForComplication(complication: complication))
    }
    
    
    // MARK: Helper Methods
    
    private func templateForComplication(complication: CLKComplication) -> CLKComplicationTemplate? {
        // Init default output:
        var template: CLKComplicationTemplate? = nil
        
        // Graphic Complications are only availably since watchOS 5.0:
        if #available(watchOSApplicationExtension 5.0, *) {
            // NOTE: Watch faces that support graphic templates are available only on Apple Watch Series 4 or later. So the binary on older devices (e.g. Watch Series 3) will not contain the images.
            if complication.family == .graphicCircular {
                let imageTemplate = CLKComplicationTemplateGraphicCircularImage()
                // Check if asset exists, to prevent crash on non-supported devices:
                if let fullColorImage = UIImage(named: "Complication/Graphic Circular") {
                    let imageProvider = CLKFullColorImageProvider.init(fullColorImage: fullColorImage)
                    imageTemplate.imageProvider = imageProvider
                    template = imageTemplate
                }
            }
            else if complication.family == .graphicCorner {
                let imageTemplate = CLKComplicationTemplateGraphicCornerCircularImage()
                // Check if asset exists, to prevent crash on non-supported devices:
                if let fullColorImage = UIImage(named: "Complication/Graphic Corner") {
                    let imageProvider = CLKFullColorImageProvider.init(fullColorImage: fullColorImage)
                    imageTemplate.imageProvider = imageProvider
                    template = imageTemplate
                }
            }
        }
        
        // For all watchOS versions:
        if complication.family == .circularSmall {
            let imageTemplate = CLKComplicationTemplateCircularSmallSimpleImage()
            let imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Complication/Circular")!)
            imageProvider.tintColor = UIColor.blue
            imageTemplate.imageProvider = imageProvider
            template = imageTemplate
        }
        else if complication.family == .modularSmall {
            let imageTemplate = CLKComplicationTemplateModularSmallSimpleImage()
            let imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Complication/Modular")!)
            imageProvider.tintColor = UIColor.blue
            imageTemplate.imageProvider = imageProvider
            template = imageTemplate
        }
        else if complication.family == .utilitarianSmall {
            let imageTemplate = CLKComplicationTemplateUtilitarianSmallSquare()
            let imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Complication/Utilitarian")!)
            imageProvider.tintColor = UIColor.blue
            imageTemplate.imageProvider = imageProvider
            template = imageTemplate
        }
        
        return template
    }
}

来源：https://stackoverflow.com/questions/39708407/watchos3-complication-that-launches-app

标签

swift

watchkit

launch

apple-watch-complication

watchos-3

WatchOS3 Complication that launches App

拟墨画扇 — Thu, 24 Dec 2020 06:27:21 +0000

WatchOS3 Complication that launches App 拟墨画扇 2020-12-24 14:27:21

问题

I would like to create a complication for watchOS 3 that will simply launch my App. I have used XCode to create the ComplicationController:

class ComplicationController: NSObject, CLKComplicationDataSource
{

    // MARK: - Timeline Configuration

    func getSupportedTimeTravelDirections(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimeTravelDirections) -> Void) {
        handler([.forward, .backward])
    }

    func getTimelineStartDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) {
        handler(nil)
    }

    func getTimelineEndDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) {
        handler(nil)
    }

    func getPrivacyBehavior(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationPrivacyBehavior) -> Void) {
        handler(.showOnLockScreen)
    }

    // MARK: - Timeline Population

    func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
        // Call the handler with the current timeline entry
        handler(nil)
    }

    func getTimelineEntries(for complication: CLKComplication, before date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) {
        // Call the handler with the timeline entries prior to the given date
        handler(nil)
    }

    func getTimelineEntries(for complication: CLKComplication, after date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) {
        // Call the handler with the timeline entries after to the given date
        handler(nil)
    }

    // MARK: - Placeholder Templates

    func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
        // This method will be called once per supported complication, and the results will be cached
        handler(nil)
    }

}

and added images for the Circular, Modular and Utilitarian assets. But when I run the Watch App I cannot select my complications for a Watch face. What do I still need to do?

Thanks

Greg

回答1:

These code changes are required:

func getSupportedTimeTravelDirections(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimeTravelDirections) -> Void)
{
    handler([])
}


func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void)
{
    if complication.family == .circularSmall
    {

        let template = CLKComplicationTemplateCircularSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Circular")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
        handler(timelineEntry)

    } else if complication.family == .utilitarianSmall
    {

        let template = CLKComplicationTemplateUtilitarianSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Utilitarian")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
        handler(timelineEntry)

    } else if complication.family == .modularSmall
    {

        let template = CLKComplicationTemplateModularSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Modular")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
        handler(timelineEntry)

    } else {

        handler(nil)

    }

}


func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void)
{        
    switch complication.family
    {
        case .circularSmall:
            let image: UIImage = UIImage(named: "Circular")!
            let template = CLKComplicationTemplateCircularSmallSimpleImage()
            template.imageProvider = CLKImageProvider(onePieceImage: image)
            handler(template)
        case .utilitarianSmall:
            let image: UIImage = UIImage(named: "Utilitarian")!
            let template = CLKComplicationTemplateUtilitarianSmallSquare()
            template.imageProvider = CLKImageProvider(onePieceImage: image)
            handler(template)
        case .modularSmall:
            let image: UIImage = UIImage(named: "Modular")!
            let template = CLKComplicationTemplateModularSmallSimpleImage()
            template.imageProvider = CLKImageProvider(onePieceImage: image)
            handler(template)
        default:
            handler(nil)
    }
}

Plus you need to provide the images as assets in the extension.

回答2:

Apple Watch 4 new graphic complications looks like this:

func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
    // Call the handler with the current timeline entry
    switch complication.family {
    case .graphicCorner:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCornerCircularImage()
            let image = UIImage(named: "Complication/Graphic Corner")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
            handler(timelineEntry)
        } else {
            handler(nil)
        }
    case .graphicCircular:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCircularImage()
            let image = UIImage(named: "Complication/Graphic Circular")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
            handler(timelineEntry)
        } else {
            handler(nil)
        }
    default:
        handler(nil)
    }
}

func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
    // This method will be called once per supported complication, and the results will be cached
    switch complication.family {
    case .graphicCorner:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCornerCircularImage()
            let image = UIImage(named: "Complication/Graphic Corner")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            handler(template)
        } else {
            handler(nil)
        }
    case .graphicCircular:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCircularImage()
            let image = UIImage(named: "Complication/Graphic Circular")!
            template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
            handler(template)
        } else {
            handler(nil)
        }
    default:
        handler(nil)
    }
}

回答3:

Add Apple Watch 4 new graphic complications (watchOS 5.0+) and prevent crash on Apple Watch Series 1, 2 and 3.

Important: the code from Zoltan will crash on Apple Watch series 3 or lower.

According to the Apple documentation, the new graphic complications require watchOS 5.0 or higher and a Watch Series 4 or later:

Note Watch faces that support graphic templates are available only on Apple Watch Series 4 or later.

let image = UIImage(named: "Complication/Graphic Corner")!

We discovered this when we found thousands of crash reports in Xcode:

Open Xcode
Window -> Organizer
Select tab "Crashes"
Select an App Store version

We found a crash report for each of the 2 Graphic complications that we support, all were with watchOS 5 or 6 and Watch Series 2 or 3, like:

Solution

Embed loading of the graphic asset within an IF statement and return nil as template, so it won't crash on devices without the asset.

The example above from Zoltan will be:

case .graphicCorner:
        if #available(watchOSApplicationExtension 5.0, *) {
            let template = CLKComplicationTemplateGraphicCornerCircularImage()
            if let image = UIImage(named: "Complication/Graphic Corner") {
                template.imageProvider = CLKFullColorImageProvider(fullColorImage: image)
                let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template)
                handler(timelineEntry)
            } else {
                handler(nil)
            }
        } else {
            handler(nil)
        }

For efficient and maintainable code, we created a reusable function templateForComplication() that is used in all 3 mandatory delegate functions:

class ComplicationController: NSObject, CLKComplicationDataSource {
    
    // MARK: Mandatory Delegate Methods
    
    func getSupportedTimeTravelDirections(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimeTravelDirections) -> Void) {
        // Turn off time travelling:
        handler([])
    }
    
    func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {
        let template = templateForComplication(complication: complication)
        let timelineEntry = CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template!)
        handler(timelineEntry)
    }
    
    func getPlaceholderTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
        // This method will be called once per supported complication, and the results will be cached
        handler(templateForComplication(complication: complication))
    }
    
    func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {
        handler(templateForComplication(complication: complication))
    }
    
    
    // MARK: Helper Methods
    
    private func templateForComplication(complication: CLKComplication) -> CLKComplicationTemplate? {
        // Init default output:
        var template: CLKComplicationTemplate? = nil
        
        // Graphic Complications are only availably since watchOS 5.0:
        if #available(watchOSApplicationExtension 5.0, *) {
            // NOTE: Watch faces that support graphic templates are available only on Apple Watch Series 4 or later. So the binary on older devices (e.g. Watch Series 3) will not contain the images.
            if complication.family == .graphicCircular {
                let imageTemplate = CLKComplicationTemplateGraphicCircularImage()
                // Check if asset exists, to prevent crash on non-supported devices:
                if let fullColorImage = UIImage(named: "Complication/Graphic Circular") {
                    let imageProvider = CLKFullColorImageProvider.init(fullColorImage: fullColorImage)
                    imageTemplate.imageProvider = imageProvider
                    template = imageTemplate
                }
            }
            else if complication.family == .graphicCorner {
                let imageTemplate = CLKComplicationTemplateGraphicCornerCircularImage()
                // Check if asset exists, to prevent crash on non-supported devices:
                if let fullColorImage = UIImage(named: "Complication/Graphic Corner") {
                    let imageProvider = CLKFullColorImageProvider.init(fullColorImage: fullColorImage)
                    imageTemplate.imageProvider = imageProvider
                    template = imageTemplate
                }
            }
        }
        
        // For all watchOS versions:
        if complication.family == .circularSmall {
            let imageTemplate = CLKComplicationTemplateCircularSmallSimpleImage()
            let imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Complication/Circular")!)
            imageProvider.tintColor = UIColor.blue
            imageTemplate.imageProvider = imageProvider
            template = imageTemplate
        }
        else if complication.family == .modularSmall {
            let imageTemplate = CLKComplicationTemplateModularSmallSimpleImage()
            let imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Complication/Modular")!)
            imageProvider.tintColor = UIColor.blue
            imageTemplate.imageProvider = imageProvider
            template = imageTemplate
        }
        else if complication.family == .utilitarianSmall {
            let imageTemplate = CLKComplicationTemplateUtilitarianSmallSquare()
            let imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "Complication/Utilitarian")!)
            imageProvider.tintColor = UIColor.blue
            imageTemplate.imageProvider = imageProvider
            template = imageTemplate
        }
        
        return template
    }
}

来源：https://stackoverflow.com/questions/39708407/watchos3-complication-that-launches-app

标签

swift

watchkit

launch

apple-watch-complication

watchos-3

Android 10.0 Application startup on BOOT

被刻印的时光ゝ — Mon, 07 Dec 2020 18:07:22 +0000

Android 10.0 Application startup on BOOT 被刻印的时光ゝ 2020-12-08 02:07:22

问题

We have an android application which we intend to start/launch during phone boot. With some code tries in Android 10, we realized that the launching of app on boot, is not possible after Android 8.0. Previously in Android 6, it was possible. Even in physical device /phone / emulator Android 10 , we gave permission in AutoStart list our application. << Objective: Any way (workaround) to launch app on boot even on latest versions , i.e. Android 8 onwards ? >>

Tries that we made in Android 10: following are 3 sections of code - AndroidManifest.xml, MyActivity.java, MyBroadcastReceiver.java

1)AndroidManifest.xml

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /><uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<activity android:name=".MainActivity"  android:launchMode="singleTop" android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<receiver android:name=".MyBroadcastReceiver" android:enabled="true" android:exported="true" android:permission="android.permission.RECEIVE_BOOT_COMPLETED" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>

2)MyActivity.java

public class MainActivity extends FlutterActivity {
@java.lang.Override
protected void onCreate(android.os.Bundle savedInstanceState) { 
super.onCreate(savedInstanceState);
// "Display pop up window"
    if (!Settings.canDrawOverlays(getApplicationContext())) {
        startActivity(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION));
    }
Log.d(TAG, "-------- onCreate -------"); // this is printed
}
}

3)MyBroadcastReceiver.java

public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
Intent i = new Intent(context, MainActivity.class);
i.setAction(Intent.ACTION_MAIN);
i.addCategory(Intent.CATEGORY_LAUNCHER);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
context.startActivity(i);
Log.d(TAG, "------ tried to launch MainActivity -------"); // this is printed
}
}
}

回答1:

Starting the app on boot can be annoying to the user. You can start a Foreground Service instead. The BOOT_COMPLETE intent can be in many different form depending on your device. I have tried to capture all of them here.

In your Manifest:

<receiver android:name=".receiver.BootReceiver" // YOUR RECEIVER HERE
        android:enabled="true"
        android:exported="true"
        android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
        <intent-filter>
            <category android:name="android.intent.category.DEFAULT" />
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.ACTION_BOOT_COMPLETED" />
            <action android:name="android.intent.action.REBOOT" />
            <action android:name="android.intent.action.QUICKBOOT_POWERON" />
            <action android:name="com.htc.intent.action.QUICKBOOT_POWERON" />
            <action android:name="android.intent.action.ACTION_SHUTDOWN" />
        </intent-filter>
    </receiver>

And in the receiver:

class BootReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent) {
        // START FOREGROUND SERVICE HERE
    }
}

来源：https://stackoverflow.com/questions/64642362/android-10-0-application-startup-on-boot

标签

android

boot

launch

Can I select per-language debug configurations in VS Code?

北城余情 — Tue, 27 Oct 2020 21:00:28 +0000

Can I select per-language debug configurations in VS Code? 北城余情 2020-10-28 05:00:28

来源：https://stackoverflow.com/questions/64441752/can-i-select-per-language-debug-configurations-in-vs-code

标签

debugging

visual-studio-code

launch

Can I select per-language debug configurations in VS Code?

混江龙づ霸主 — Tue, 27 Oct 2020 20:59:47 +0000

Can I select per-language debug configurations in VS Code? 混江龙づ霸主 2020-10-28 04:59:47

来源：https://stackoverflow.com/questions/64441752/can-i-select-per-language-debug-configurations-in-vs-code

标签

debugging

visual-studio-code

launch

Windows terminal: open multiple panes and execute specified command

青春壹個敷衍的年華 — Thu, 27 Aug 2020 16:51:27 +0000

Windows terminal: open multiple panes and execute specified command 青春壹個敷衍的年華 2020-08-28 00:51:27

来源：https://stackoverflow.com/questions/62468029/windows-terminal-open-multiple-panes-and-execute-specified-command

标签